The hammer was brought down when the alloy was not properly positioned, striking it with a glancing blow rather than a direct impact, causing it to fly off the anvil at great speed and strike him in the chest.

An investigation by the Health and Safety Executive (HSE) found the forging firm had failed to allocate the job to the correct hammer and crew that day, July 17, 2015, and failed to properly assess the risks involved with hammering small components on large hammers.

It also found the company failed to provide a safe system of work that considered communication and which allowed line of sight of the work piece.

Speaking after the hearing, HSE inspector Carol Downes said: "This tragic incident could easily have been prevented if the employer had acted to identify and manage the risks involved, put a safe system of work in place, and ensure that the job was allocated to the appropriate equipment.

"Companies should be aware that HSE will not hesitate to take appropriate enforcement action against those that fall below the required standards."

Abbey Forged Products managing director Jackie Neal said: "This company has always held the protection and safety of our employees as sacrosanct, and we have done all we thought possible to avoid any accident.

"The tragic loss of Billy during the course of his work routine, and the damage to his family has been unbearable, for all concerned here.

"He had achieved great things during the course of his employment, something Billy, his family and ourselves could be justifiably proud of.

"We would have done anything and everything to change the outcome of that day, and the trauma and pain will not be forgotten.

"This is a family business in every respect, and Billy was a member of our family. It is unfortunate and disappointing that Billy’s family will not receive support from the fine."